Synthesis and structure of [C{sub 6}H{sub 14}N{sub 2}][(UO{sub 2}){sub 4}(HPO{sub 4}){sub 2}(PO{sub 4}){sub 2}(H{sub 2}O)].H{sub 2}O: An expanded open-framework amine-bearing uranyl phosphate
- Department of Chemistry and Biochemistry and Center for Actinide Science, Auburn University, Auburn, AL 36849 (United States)
A new open-framework compound, [C{sub 6}H{sub 14}N{sub 2}][(UO{sub 2}){sub 4}(HPO{sub 4}){sub 2}(PO{sub 4}){sub 2}(H{sub 2}O)].H{sub 2}O, (DUP-1) has been synthesized under mild hydrothermal conditions. The resulting structure consists of diprotonated DABCOH{sub 2}{sup 2+} (C{sub 6}H{sub 14}N{sub 2}{sup 2+}) cations and occluded water molecules occupying the channels of a complex uranyl phosphate three-dimensional framework. The anionic lattice contains uranophane-like sheets connected by hydrated pentagonal bipyramidal UO{sub 7} units. [C{sub 6}H{sub 14}N{sub 2}][(UO{sub 2}){sub 4}(HPO{sub 4}){sub 2}(PO{sub 4}){sub 2}(H{sub 2}O)].H{sub 2}O possesses five crystallographically unique U centers. U(VI) is present here in both six- and seven-coordinate environments. The DABCOH{sub 2}{sup 2+} cations are held within the channels by hydrogen bonds to both two uranyl oxygen atoms and a {mu}{sub 2}-O atom. Crystallographic data (193 K, Mo K{alpha}, {lambda}=0.71073 A): DUP-1, monoclinic, P2{sub 1}/n, a=7.017(1) A, b=21.966(4) A, c=17.619(3) A, {beta}=90.198(3){sup o}, Z=4, R(F)=4.76% for 382 parameters with 6615 reflections with I>2{sigma}(I). - Graphical abstract: Packing diagram of the three-dimensional channels and occluded DABCOH{sub 2}{sup 2+} and water molecules found in [C{sub 6}H{sub 14}N{sub 2}][(UO{sub 2}){sub 4}(HPO{sub 4}){sub 2}(PO{sub 4}){sub 2}(H{sub 2}O)].H{sub 2}O.
- OSTI ID:
- 21128432
- Journal Information:
- Journal of Solid State Chemistry, Vol. 181, Issue 9; Other Information: DOI: 10.1016/j.jssc.2008.05.014; PII: S0022-4596(08)00235-1; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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